Abstract: An exchangeable two-part polymeric golf cleat. The first part includes that portion of the cleat which contains the threaded stem for insertion into the outer sole of the shoe, at least a portion of the central hub, and a plurality of cantilevered projection traction elements. The second part includes the remainder (if any) of the central hub and a plurality of cantilevered projection traction elements. The first and second parts are of distinctly different colors. When different materials are used in the two parts, it is preferable that the first part have a harder durometer than the second part. The user of the cleat may determine when the traction element has been worn down to such an extent that adequate traction will soon no longer be provided. This determination can be made by visually observing the distinct color of the first portion visible in the traction element.

Abstract: A cleat for athletic shoes which provides a sole attachment member; a hub having a planar upper portion for contacting the shoe sole, a rounded lower portion for bearing weight of the user, and an edge; and resilient traction elements. The resilient elements are made up of an outward band extending from the periphery of the upper portion of the hub, an inner band extending from the periphery of the lower portion of the hub, a bottom band, a top band, and a space bordered by the outer band, the inner band, the bottom band and the top band. When the user is walking on soft surfaces, the traction elements provide traction and the lower portion of the hub does not bear weight. When the user is walking on hard surfaces, the resilient traction elements bend outwardly allowing the hub to contact the walking surface and bear weight. This allows for longer life of the traction elements as well as uniform contact.

Abstract: A dual-action disconnect valve mechanism for a double column manometer that simultaneously disconnects both tubes of the manometer from external pressure regions or sources, and a fluid displacement reservoir conveniently adjustable for varying the device's reservoir capacity and the height of liquid in the tubes, this adjustment being by a screw type adjustment which easily and conveniently achieves an accurate condition of the liquid levels being substantially exactly at the zero calibration marking. The concepts provide that supplying the manometer liquid at a precise height along the calibration scale without having to move the scale relative to the tubes.

Abstract: A protective container for a scuba tank. The container is made of rugged, flexible material, such as plastic or rubber. The container has an open top for placing the container over the tank, a cylindrical body for protecting the side of the tank, and a base for protecting the bottom of the tank. The upper portion of the container is tapered gently inwardly and upwardly to decrease resistance to the water. The inner surface of the container has longitudinal ribs for draining water from the top to the bottom of the container. The outer surface of the container has five longitudinal outriggers to prevent rolling of the tank when it is lying on a surface and providing the least amount of resistance to the water when the tank is in use. The container wall is extended below the base to supply protection against vertical stress when the tank is dropped. The inner surface of the base contains radial drainage channels to dispose of water inside the container. The outer surface of the base contains strengthening ribs.